Air heater



G. D. NICHOLSON AIR HEATER Filed June 4, 192B July 29, 1930.

Patented July 29, 1930 UNITED STATES PATENT/ePrice n .a GEORGE D ivIoHoLsoN, or'GAMBRIDGE, oH'Io AIR HEATER Application filedV .Tune 4,

This invention relates to improvements in air heaters.

The prime obj ect of the invent-ion i-s to provide a unit for utilizing waste heat ordinarily y 5 allowed to pass off through the flue to the atmosphere.

A further object of the invention is to provide a specific form of radiator unit for the passage of the escaping products of combus- 19 tion and spent gases, whereby to afford ample surface to collect the heat and dissipate the same toheat air introduced around the radiator for subsequent use.

A still further object of the invention is to' I 5 provide a radiator with a circuitous path for the escaping products of combustion, and surround the radiator with a casing to trap air and heat same to be subsequently utilized for heating purposes.

The invention also comprehends improvements in the details of construction and arrangement of part-s `which will'be hereinafter described and particularly pointed out in the claims. n l' In the drawing:

heater. l

F 1g. 2 is a side elevation of the same. Fig. 8 is an end view. l indicates a radiator or manifold comprising a series of superimposed flat sections 2,

connected at opposite ends with adjacent sec-l tions by short pipe sections 8. The upper flat section is extended aty one end beyond the vertical plane of the sections below, the eX- tension having anvopening 4 with which an inlet flue 5 communicates.

At the ends of the flat sections adjacent to the ends connected by the short pipe sections or braces between the sections. The lowermost flat section 2 is connected to an vexit flue 6.

Fitting over the radiator section and spaced from the sam-e, is a casing 7. This casing is supported on legs and is open at the bottom for free admission of air in the space around the radiator. An outlet opening or openings 9, is formed in the upper portion of the casing for the exit of the heated air, and

` thel opening 9.

Fig.l l is a top plan view of my improved 3, are interposed plates which form supports 192s. Yserial NQ. 282,794.

between the endof' the top iat'section Y2fisfa i baffle' l0, which deflects thev rising airy toward In operation, the improved heater vis disposed adjacent a gas or coal heater or furnace using any formof fuel, they flue pipe beingv connected tothe inletiilue 5. The escaping products of combustion 'then pass into the j topmost flat section l, thence through the topmost `short pipe section 3 to the next adjacent flat section. The products pass` lengthwise through the neXt flat' section and out the short pipe section and so on throughout lthe length of theV radiator to theeXit` flue'. In transit, the escaping products ofv combustion and spentgases follow a zig-zag .course and v by the time the eXit flue 6 is reached, substantially all the heat has been givenolf. The heat passing through the radiator heats the air'passingvthrough the r,bottom ofthe casing,

and this highly heated air is conveyed arrangement tends to heatthe radiator and thereby prolong the heat in the products of combustion passing to the exit flue. To support the radiator, braces l5 are interposed between the flat sections, while'bars or the like 16 at the bottom of the casing afford a support-for the lowermost section.

It is thought from the foregoing descrip? tion the construction will be Vreadily understood and the advantages fully appreciated.

What I claim is: y 1. A radiator including a casing open at the bottom and closed at the top, one wall of '1 7 the casing near the top being formed with an outlet opening, a heating elementl arranged in the casing and including. a series of superimposed hollow sections interconnected at relatively opposite ends to provide atortuous lllll passage throughout the heating element, said heating element being arranged Withinthe Casing in spaced relation to the Walls thereof, the upper section of the heating element being extended beyond the remaining sections, and a flue pipe connected to the extended portion of said upper section, said 7flue pipe extending longitudinally loi and Wholly beyond the heating eleiiient and Within and spaced :from 10 the casing for a length corresponding to the vertical dimension of the heating element, whereby lthe air Within the casing is heated by the heatingreleinentand by the fluepipe. 2. A radiator comprising a casing open 1,-, at the bottom and closed at the top and havingvxside Vand end Walls, oneoi1 the side Walls being orrned near thetop ofthe casingrwith a" heated air outlet, a heating ele'in'ent arranged Wholly Within the Casing,and corn- .pris'iingga .series of superimposedfhollow see-r tions connected :forintereomniuuication, the uppermost section being vextended laterally, s ail heating element ,being arranged in the casing inspaced relation to the side Walls and 5 'substantially to one side of the vertical lne- (lian line yof the casing, to thereby provide a lmaterially larger casing Space beyondl the heating eleinentin one ldirection than in the opposite directionanda liiue pipe projecting eo .Within Vtheenlarged space in the casing and lextended parallel to the heating element and Connectedto and inopen c'onlinunication with the projecting portion of the uppermost sec- Ytion of 4the'h'ea'tin'g element. y

5;.1 In' te'stiinony'ivhereof I ,aiiix niy Signature.

"GEGRG D.' NICHOLSON. I [11s.] 

